Go to…. Introduction Adire Apex Jr BK Electronics Madisound Parts Express RCM Akustik Stryke Audio

Adire Audio:

Adire sells amps sourced by Keiga and others. Adire claims thar theirs are not standard units, though. Unique in the Adire line are two high-power full-range plate amps (i.e. not just for subwoofers and lacking the usual crossover and EQ). These are especially designed for pro use and feature XLR inputs and pass-through outputs. 1. HS200 - 150W @ 8 Ω, 200 W @ 4 Ω - class AB. Price: $349. Features: THD = <0.05% S/N = >100 dB Crossover frequency: 50-150 Hz, continuously variable Crossover slope: 24 dB/octave Other EQ: Bass boost - 1 dB @ 25 Hz Subsonic filter - 12 dB/octave, Q=0.96 @ 18 Hz Satellite filter - 24 dB/octave @ 50-150 Hz, continuously variable independent of subwoofer crossover Phase control: Inverting switch Inputs: Low level summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = 15 KΩ (low level) or 1 KΩ (high level) Cutout: 6 x 12 in. (152.4 x 304.8 mm) Weight: 16 lbs (7.26 kg) 2. AVA250 - 180W @ 8 Ω, 250 W @ 4 Ω - class AB Price: $179. Features: THD = <0.1% S/N = >103 dB Crossover frequency: 40-160 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - 1 dB @ 25 Hz Subsonic filter - 12 dB/octave, Q=0.96 @ 18 Hz Satellite filter - 6 dB/octave @ 125 Hz high level only Phase control: Continuously variable, 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 85 mV Sensitivity (high level) = 2.83 V Input impedance = 20 kΩ Cutout: 9.25 x 9.25 in. (235 x 235 mm) Weight: 12 lbs (5.44 kg) 3. HS500 - 490W @ 8 Ω, 720 W @ 4 Ω - class AB. Two-piece unit comprising the amplifier/control panel and a separate internally-mounted power supply. Price: $629. Features: THD = <0.05% S/N = >105 dB Crossover frequency: 50-150 Hz, continuously variable Crossover slope: 24 dB/octave Other EQ: Bass boost - 0-6 dB @ 20-50 Hz Subsonic filter - 12 dB/octave, Q=0.96 @ 12 Hz Satellite filter - 24 dB/octave @ 50-150 Hz, continuously variable independent of subwoofer crossover Phase control: Inverting switch Inputs: Low level summed to mono Sensitivity (low level) = 1V Sensitivity (high level) = N.A. Input impedance = 10 KΩ Cutout: Amplifier - 6 x 13.25 in. (152.4 x 336.6 mm) Power supply - Not Needed (internal mount) 7.5" w x 13" l by 3" h (190.5 x 330.2 x 76.2 mm) Weight: Amplifier - 8 lbs (3.63 kg) Power supply - 18 lbs (8.16 kg) 4. A750 - 490W @ 8 Ω, 720 W @ 4 Ω - class not specified Price: $629. Features: THD = <0.003% S/N = >100 dB Crossover frequency: full-range, 20-20k Hz +/- 1 dB Crossover slope: N.A. Other EQ: None Phase control: None Inputs: XLR Sensitivity = 1.5 Vrms Input impedance = 5 KΩ Cutout: 5.75 x 12 in. (146.1 x 304.8 mm) Weight: 26 lbs (11.79 kg) 5. A1500 - 700W @ 8 Ω, 1250 W @ 4 Ω - class not specified Price: $899. Features: THD = <0.003% S/N = >100 dB Crossover frequency: full-range, 15-100k Hz +0/-1 dB Crossover slope: N.A. Other EQ: None Phase control: None Inputs: XLR Sensitivity = 1.5 Vrms Input impedance = 5 KΩ Cutout: 5.75 x 18 in. (146.1 x 457.2 mm) Weight: 33 lbs (14.97 kg)

Adire distributors & dealers: North America Creative Sound Solutions and DIY Cable.com International: Direct from Adire

Apex Jr.:

Apex Jr. is a distributor of mostly closeout merchandise, albeit with a more stable inventory than many other surplus/closeout dealers. One of its specialties ahs been plate amps, several of which have been recommended as excellent performers and great values. 1. Apex "Junior" - 100W @ 8 Ω, 130 W @ 4 Ω - class AB. Price: $90. Also available with 115V/230V version with detachable cord: $95.00. Features: THD = <0.1% S/N = >70 dB Crossover frequency: 60-125 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = 85 mV Sensitivity (high level) = 1 V Input impedance = 47 KΩ Cutout: 8 x 8 in. (203.2 x 203.2 mm) Weight: 9 lbs (4.08 kg) 2. Apex "Senior" - 250W @ 8 Ω, 350 W @ 4 Ω - class AB. Price: $225 (115/230V 50/60Hz). Features: THD = <0.1% S/N = >101 dB Crossover frequency: 40-160 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - 6 dB @ 30 Hz Subsonic filter - No Satellite filter - 6 dB @ 125 Hz Phase control: 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 156 mV Sensitivity (high level) = 3.75 V Input impedance = >20 KΩ Cutout: 11.25 x 9.25 in. (285.75 x 234.95 mm) Weight: 12 lbs (5.44 kg) 3. VRS-1205 - 100W @ 8 Ω, 150 W @ 4 Ω - class D. Price: $100 incl/ remote control. Features: THD = 0.08% S/N = 85 dB Crossover frequency = 40-180 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - N.A. Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 7-1/2 x 9-1/8 in. (190.5 x 231.8 mm) plus separate volume/frequency control panel, size N.A. Weight: 11.0 lbs. (5.00 kg)

Apex Jr distributors & dealers: International: Order direct from Apex Jr

BK Electronics:

BK is a British manufacturer of well-respected amplifier modules. It's unclear whether its plate amps are designed and/or built in-house, or supplied by an outside OEM - not that it really matters. 1. BSBP 50/8 - 50 W @ 8 Ω, N.A. W @ 4 Ω - class not stated. Price: $145. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 60-240 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - -3 dB @ 10 Hz Satellite filter - No Phase control: 0, 180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 9.17 x 5.94 in. (233 x 151 mm) Weight: 3.3 lbs. (1.5 kg) 2. BSBP 100/8- 100 W @ 8 Ω, N.A. W @ 4 Ω - class not stated. Price: $188. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 60-240 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: 0, 180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 10 x 10 in. (254 x 254 mm) Weight: 6 lbs. (2.7 kg) 3. BSBP 100/4- N.A. W @ 8 Ω, 100 W @ 4 Ω - class not stated. Price: $188. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 60-240 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: 0, 180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 10 x 10 in. (254 x 254 mm) Weight: 6 lbs. (2.7 kg) 4. BSBP 200/8 - 205 W @ 8 Ω, N.A. W @ 4 Ω - class not stated. Price: $240. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 40-120 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: 0, 180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 10 x 10 in. (254 x 254 mm) Weight: 11.0 lbs. (5.0 kg) 5. BSBP 200/4 - N.A. W @ 8 Ω, 210 W @ 4 Ω - class not stated. Price: $240. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 40-120 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: 0, 180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 10 x 10 in. (254 x 254 mm) Weight: 11.0 lbs. (5.0 kg) 6. BSBP 300/4 - N.A. W @ 8 Ω, 300 W @ 4 Ω - class not stated. Price: $296. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 40-240 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 10.2 x 10.2 in. (259 x 259 mm) Weight: 14.3 lbs. (6.5 kg) 7. BSBP 500/4 - N.A. W @ 8 Ω, 500 W @ 4 Ω - class not stated. Price: $352. Features: THD = 0.05% S/N = 100 dB Crossover frequency: 40-240 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - No Satellite filter - No Phase control: 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 1.5 V Input impedance = N.A. Size: 10.2 x 10.2 in. (259 x 259 mm) Weight: 15.4 lbs. (7 kg)

BK distributors & dealers: North America Old COlony Sound Labs UK & International: Direct from BK Electronics

Madisound:

Madisound is a major supplier of Keiga-OEM'ed plate amps to the DIY market. 1. KG-5150 - 150W @ 8 Ω, 200 W @ 4 Ω - class not stated. Price: $169. Features: THD = 0.03% S/N = 95 dB Crossover frequency: 50-100 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - +4 dB @ 25 Hz, fixed & unswitchable Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = 75 mV Sensitivity (high level) = 3.5 V Input impedance = 22 KΩ Cutout: 10-7/16 x 7-1/4 in. (290.5 x 184 mm) Weight: 10.5 lbs. (4.76 kg) 2. KG-5150V - 150W @ 8 Ω, 200 W @ 4 Ω - class D. Price: $169. Features: THD = 0.03% S/N = 95 dB Crossover frequency: 50-100 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - +4 dB @ 25 Hz, fixed & unswitchable Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = 75 mV Sensitivity (high level) = 3.5 V Input impedance = 22 KΩ Cutout: 7-5/16 x 10-7/16 in. (185.7 x 290.5 mm) Weight: 10.5 lbs. (4.76 kg) 3. KG-5230 - 175W @ 8 Ω, 300 W @ 4 Ω - class D. Price: $225. Features: THD = 0.08% S/N = 85 dB Crossover frequency = 50-100 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - +4 dB @ 25 Hz, fixed & unswitchable Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 2 V Input impedance = 22 KΩ Cutout: 9-7/8 x 9-7/8 in. (250.8 x 250.8 mm) Weight: 14.5 lbs. (6.71 kg)

Madisound distributors & dealers: International: Available directly from Madisound

Parts Express:

Parts Express followed Madisound's lead in offering a variety of mostly Keiga-sourced plate amps. 1. 300-792 - 110 W @ 8 Ω, 156 W @ 4 Ω - class D. Price: $100. Features: THD = 0.1% S/N = 98 dB Crossover frequency = 40-160 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - Yes Satellite filter - 6 dB @ 125 Hz Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 7.25 x 9.625 in. (184 x 244.5 mm) Weight: N.A. 2. 300-794 - 150 W @ 8 Ω, 250 W @ 4 Ω - class D. Price: $128. Features: THD = 0.1% S/N = 101 dB Crossover frequency = 40-160 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - No Subsonic filter - Yes Satellite filter - 6 dB @ 125 Hz Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 10.375 x 10.438 in. (263.5 x 265 mm) Weight: N.A. 3. 300-796 - 150 W @ 8 Ω, 250 W @ 4 Ω - class D. Price: $128. Features: THD = 0.1% S/N = 101 dB Crossover frequency = 40-160 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - 5 dB @ 30 Hz Subsonic filter - Yes Satellite filter - 6 dB @ 125 Hz Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 10.375 x 10.438 in. (263.5 x 265 mm) Weight: N.A. 3. 300-793 - 150 W @ 8 Ω, 250 W @ 4 Ω - class D. Price: $140. w/ remote control Features: THD = 0.1% S/N = 101 dB Crossover frequency = 40-160 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - 5 dB @ 30 Hz Subsonic filter - Yes Satellite filter - 6 dB @ 125 Hz Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 10.375 x 10.438 in. (263.5 x 265 mm) Weight: N.A.

Parts Express distributors & dealers: International: Order direct from Parts Express

RCM Akustik:

RCM Akustik is arguably the premier manufacturer of plate amps, offering the sort of engineering expected of a top-line German company. Not surprisingly, their products are typically priced somewhat higher than many of the Asian plate amps. RCM is also an OEM, and its plate amps are also sold by some other comapnies. 1. DT150 - N.A. W @ 8 Ω, 150 W @ 4 Ω - class D w/ switchable soft limiting. Price: $165. Features: THD = <0.05% S/N = >97 dB Crossover frequency = 50-150 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - 0, +3, +6 dB @ 20-45 Hz in 5 Hz increments, switchable Subsonic filter - 18, 20, or 23 Hz, switchable Slope not specified Satellite filter - Yes, frequency and slope not specified Phase control: 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 20 mV Sensitivity (high level) = 950 mV Input impedance = N.A. Cutout: 9.25 x 7.09 in. (235 x 180 mm) Weight: 11 lbs. (5 kg) 2. DT300 - N.A. W @ 8 Ω, 300 W @ 4 Ω - class D w/ switchable soft limiting. Price: $249. Features: THD = <0.05% S/N = >97 dB Crossover frequency = 50-150 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - 0, +3, +6 dB @ 20-45 Hz in 5 Hz increments, switchable Subsonic filter - 18, 20, or 23 Hz, switchable Slope not specified Satellite filter - Yes, frequency and slope not specified Phase control: 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = 12 mV Sensitivity (high level) = 580 mV Input impedance = N.A. Cutout: 9.25 x 7.09 in. (235 x 180 mm) Weight: 11 lbs. (5 kg)

RCM Akustik distributors & dealers: Germany Open Air Loudspeaker The Netherlands Remo UK BK Electronics

Stryke Audio:

Stryke Audio is a highly respected vendor to the DIY community who also sells plate amps from Keiga and Apex Jr to his customers wanting to do "one-stop" subwoofer shopping. 1. AMP130 - 100W @ 8 Ω, 130 W @ 4 Ω - class D. Price: $90. Features: THD = <0.1% S/N = >70 dB Crossover frequency: 60-125 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - N.A. Subsonic filter - N.A. Satellite filter - N.A. Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = 47 KΩ Cutout: 8 x 8 in. (203.2 x 203.2 mm) Weight: 9 lbs (4.08 kg) 2. AMP350 - 250W @ 8 Ω, 350 W @ 4 Ω - class D. Price: $225. Features: THD = <0.1% S/N = >101 dB Crossover frequency: 40-160 Hz, continuously variable Crossover slope: N.A. Other EQ: Bass boost - +6 dB @ 30 Hz (removable, optionally +1 dB @ 23 Hz) Subsonic filter - -3 dB @ 18 Hz (removable) Satellite filter - N.A. Phase control: Continuously variable 0-180 degrees Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 11.25 x 9.25 in. (285.75 x 234.95 mm) Weight: 12 lbs (5.44 kg) 3. KG-5150 - 150W @ 8 Ω, 200 W @ 4 Ω - class D. Price: $169. Features: THD = 0.03% S/N = 95 dB Crossover frequency: 50-100 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - +4 dB @ 25 Hz, fixed & unswitchable Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = 75 mV Sensitivity (high level) = 3.5 V Input impedance = 22 KΩ Cutout: 10-7/16 x 7-1/4 in. (290.5 x 184 mm) Weight: 10.5 lbs. (4.76 kg) 4. KG-5230 - 175W @ 8 Ω, 300 W @ 4 Ω - D. Price: $225. Features: THD = 0.08% S/N = 85 dB Crossover frequency = 50-100 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - +4 dB @ 25 Hz, fixed & unswitchable Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = 150 mV Sensitivity (high level) = 2 V Input impedance = 22 KΩ Cutout: 9-7/8 x 9-7/8 in. (250.8 x 250.8 mm) Weight: 14.5 lbs. (6.71 kg) 5. VRS-1205 - 100W @ 8 Ω, 150 W @ 4 Ω - class not stated. Price: $100 incl/ remote control. Features: THD = 0.08% S/N = 85 dB Crossover frequency = 40-180 Hz, continuously variable Crossover slope: 12 dB/octave Other EQ: Bass boost - N.A. Subsonic filter - No Satellite filter - No Phase control: Inverting switch Inputs: Low & high level, summed to mono Sensitivity (low level) = N.A. Sensitivity (high level) = N.A. Input impedance = N.A. Cutout: 7-1/2 x 9-1/8 in. (190.5 x 231.8 mm) plus separate volume/frequency control panel, size N.A. Weight: 11.0 lbs. (5.00 kg)

Stryke distributors & dealers: International: Order direct from Stryke

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