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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Sherwood AP-7020 this old man!!!!
Sherwood AP-7020 this old man!!!!
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Old 13th February 2019, 07:50 PM   #1
mprivitera1 is offline mprivitera1  Italy
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Default Sherwood AP-7020 this old man!!!!

Hi guys,

some of you have tried this old preamp .... what about the presence of a crossover for high frequency cut and low frequency?

Thank you

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Old 13th February 2019, 08:39 PM   #2
Tromperie is offline Tromperie  Australia
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Looks like the output from the "Divider Output" provides for a separate subwoofer and gives a choice of 75 or 150 Hz low pass. The HP is for the output above the subwoofer output.
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Source: Daphile on old PC from the tip * Storage NAS: FreeNAS 11 * Pre-amp: DIY PGA2310 * Amps: 8 x LM3886TF
Xover: 24dB @ 300 and 3,000Hz * Speakers: DIY design CNC cut 54 laminations * Drivers SB 10", SB 5", VIFA 1" VTG
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Old 14th February 2019, 05:22 AM   #3
mprivitera1 is offline mprivitera1  Italy
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... here the schematic from the manual ... has in practice 5 outputs ... Someone has tried the LPFout + HPFout ?


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Old 14th February 2019, 10:28 PM   #4
Tromperie is offline Tromperie  Australia
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Just as I said.
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Source: Daphile on old PC from the tip * Storage NAS: FreeNAS 11 * Pre-amp: DIY PGA2310 * Amps: 8 x LM3886TF
Xover: 24dB @ 300 and 3,000Hz * Speakers: DIY design CNC cut 54 laminations * Drivers SB 10", SB 5", VIFA 1" VTG
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