AllegroSound



• buy • sell • trade •



...fabled...
PIONEER
Series20
D-23
crossover








2-way, 3-way or 4-way crossover functions.



All-discrete, pure-complimentary, Class-A, SEPP buffer-amplifiers with differential power supply for purest sound.



High Input-Impedance and Low Output-Impedance prevent input-source and output-load from influencing the filters in any way.



Dual High-Voltage Power-Supply of ±30V regulated at ±22V, providing wide dynamic range and excellent channel separation.



Frequency selection every one-third octave.



Independent Slope and Frequency, each section.



Level control in 1-dB steps, each channel, each section.



Selectable cutoff Slopes of 6, 12 or 18 dB/oct.



6dB/oct & 18dB/oct are -3dB at Fc.
12dB/oct is -6db at Fc.




Precision switches and controls -
quality you can feel as well as hear.




 Type Electronic Crossover, 2/3/4-way
 Circuitry
 Buffer amp:    Plus/Minus dual power source Class-A SEPP
 Filter section: CR Passive Fltr (6db/oct & 12db/oct)
 CR Active Fltr + CR Passive Fltr (18db/oct) 
 Cutoff Frequency Low (High Cut), Mid-Low (Low Cut):
   63, 80, 100, 125, 160, 200, 250, 320, 400,500, 630 Hz.
 Mid- Low (High Cut), Mid-High (Low Cut):
   320, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.5k.
 Mid-High (High Cut), High (Low Cut):
   1.6k, 2k, 2.5k, 3.2k, 4k, 5k, 6k, 8k, 10k, 12.5k, 16k Hz.
 Slope 6db/oct, 12db/oct, 18db/oct (independent, each section)
 Level control 0 ~ -30db in 1-db steps (independent, each channel)
 Insertion Loss < 2db
 Input Impedance 100k Ohms
 Output Impedance 4k Ohms max
 Output into 50k Ohms    1V nominal, 10V max
 THD (20~20k Hz) 0.005% at 1V output
 0.1% at 10V output
 Frequency Response  10~100k Hz, +0/-1db
 SN ratio at 1V output  -100db (IHF-A)
 Semiconductors  71 transistors, 18 diodes/etc.  Zero IC's!
 Power Consumption 11 Watts
 Dimentions 20" Wide, 6" High, 14" Deep
 Weight 20 lbs


AllegroSound
−  Established 1973  −
"love what you listen with"
Los Angeles, California USA
Rick@AllegroSound.com


 Master-Index  


AllegroSound et al assumes no responsibility for use or misuse of products, services, info, etc.
design & original content ©AllegroSound, los angeles, california, usa. all rights reserved.

AllegroSound
−  Established 1973  −
"love what you listen with"
Los Angeles, California USA
Rick@AllegroSound.com
telephone 323.960.5014

> home < > home < > home < > home < > home < > home < > home <

design and original content ©AllegroSound, los angeles, usa. all rights reserved.