Single 5842 RF tube line preamp w/Magnequest output transformer model "DS 050/600," 3 output taps = 3 gain choices from 8 to 21.3 dB. My best understanding is 600 ohm output w/maximum gain of 21.3 dB. Currently wired for 18 dB gain with lower output impedance, estimate 500 ohm.
The total load is 3 different parallel amplifiers, 8.7k ohm total, as follows:
Above source to load ratio appears to be a very reasonable 1:16. Pros recommend 1:10 minimum.
A professional with a lot of SA1000 history said SA1000 had enough gain > same 8 ohm sub load, even with Edgarhorns specified over 100 dB, at least 10 dB higher than my application.
Why might my SA1000 gain seem to be lacking? Both SA1000 indicate similar gain, so the gain is correct and typical.
Thanks!
The total load is 3 different parallel amplifiers, 8.7k ohm total, as follows:
- Main amp: 100k ohm input Z, gain 27 dB, .97Vrms = full power @ 8 ohm > 90.5 dB satellite speaker, 9 ohm
- 2nd amp: 335 mV, 47k Ω > reverberant field speaker system
- Dayton SA1000 subwoofer amp: 12k ohm, gain/sensitivity not specified but rep said likely .775mV (industry standard for domestic audio) for full output @ 4 ohm > dual 4 ohm subs in series, 8 ohm, 89 dB per pair (one SA1000 > 2 subs p/c)
Above source to load ratio appears to be a very reasonable 1:16. Pros recommend 1:10 minimum.
A professional with a lot of SA1000 history said SA1000 had enough gain > same 8 ohm sub load, even with Edgarhorns specified over 100 dB, at least 10 dB higher than my application.
Why might my SA1000 gain seem to be lacking? Both SA1000 indicate similar gain, so the gain is correct and typical.
Thanks!