Go to…. Introduction Marchand John Pomann

Marchand:

Marchand sells most of their products assembled, as kits, or as EZ kits (most of the hard work already done). 1. XM1 - single channel, 24 dB/octave Price: $25 kit, $30 assembled Features: Frequency selection: 20 to 5k Hz, by plug-in module. Damping: None Phase: Variable, Fixed Time delay: None Frequency response: DC - 100k Hz THD = <0.01% S/N = >100 dB Gain = 0 dB Input impedance = 100 KΩ Output impedance = 50 Ω Maximum input = ± 12.5 V. Maximum output = ± 12.5 V. Power: ± 15 VDC @ 50 mA. Size: 2 x 3 x 1 in. (50.8 x 76.2 x 25.4 mm)

Marchand Electronics distributors & dealers: International: Sold directly by Marchand Electronics

John Pomann's DIY active crossover kit:

John Pomann has been a respected member of the DIYspeakers mailing list for many years. Some time back, John began producing active filter modules in kit form. Unfortunately, as this is written, John is completing his medical rersidency requirements and has little time to support these. However, this information at his web site (also hosted on the SNIPPETS.ORG server) remain valuable for the DIY active filter builder. 1. Stereo 3-way, 24 dB/octave Linkwitz-Riley or 6 dB/octave Butterworth (other configurations possible). Price: $75 kit (standard), $85 (w. OPA2124 op amps), with power supply. Features: Frequency selection: 50 steps from 42.1 to 9.175k Hz, optional at assembly time. Damping: None Phase: Fixed Time delay: None Frequency response: DC - 100k Hz THD = N.A. S/N = N.A. Gain = N.A. Input impedance = N.A. Output impedance = N.A. Maximum input = N.A. Maximum output = N.A. Size: N.A.

Pomann distributors & dealers: International: Available from John Pomann's web site.

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