ADA Power Amps > T100s
Does preamp size affect output level?
assquatch20:
I've got a little Blackstar HT5 and I was running the fx send through a stereo tremolo into the rack unit. I've never had a dedicated power amp, let alone a stereo one, so I don't know if this is typical. The volume never overpowered the 5W. It may just be because they're not that far apart in max volume realistically but I feel like there's more to it. I need to experiment with a bigger amp and see if it ramps up a bit more to match. Pretty much I'm wondering if this is normal or if I have a poorly functioning power amp.
rnolan:
Hey assquatch20, I'm not quite sure what you mean or quite how you've got this set up. (I've got a little Blackstar HT5 and I was running the fx send through a stereo tremolo into the rack unit), what rack unit ? are you returning into the HT5 to use it's 5w power amp (and speaker if it's the combo) ?Your HT5 has 2 tubes, one is the preamp tube, the other is its poweramp tube (so you do have a dedicated power amp albeit only 5w.( Does preamp size affect output level?) not sure what you mean here, output level is a combination of things but mostly affected by the power amp (in your case 5w) and speaker(s) efficiency. A preamp with more tubes can produce more gain and 'potentially' drive the poweramp harder, depending on the circuit.The HT5 is a nice unit but not very loud, good for bedroom style or possibly studio use (but then you'd probably use its cab sim outs direct into the desk.
I don't think you have a poorly functioning power amp, it's just not a very loud amp, 5w is not allot of power.
Kim:
I assume "rack unit" = ADA T100s ?
I agree that it seems something isn't quite right. The T100s should be very apparent that it is capable of being louder than the HT 5.
What speakers are you using? I wonder if perhaps the Input signal to the poweramp is just not as high as it should be?
assquatch20:
--- Quote from: Kim on January 27, 2019, 07:33:42 AM ---I assume "rack unit" = ADA T100s ?
I agree that it seems something isn't quite right. The T100s should be very apparent that it is capable of being louder than the HT 5.
What speakers are you using? I wonder if perhaps the Input signal to the poweramp is just not as high as it should be?
--- End quote ---
This is correct. I have a -10/+4dB on the fx loop that I have at +4. The pots on the stereo amp are very scratchy so they may be to blame. In certain positions it seems like it's not getting through. The Blackstar has nothing in the fx return, its power amp is keeping up with the ADA power amp somehow. As I increase the volume on the B* the ADA volume seems to rise as well. I need to test with a larger amp with fx loop and/or maybe a dB meter to be sure I'm not fooling myself with wattage:volume not being linear and such.
The speakers I'm using are a 1960A in the center off the B* and the ADA stereo power amp is feeding two split stacks. The B* has a stereo DI (stereo reverb) but I'd need a shielded stereo splitter cable of some sort to test it. The issue is it comes with cab emulation you can't turn off, but I do believe the dB switch affects the DI as well. It would be nice if the FX send had the reverb, especially if it were stereo, but maybe I'll get a cable and the cab emulation through DI would be tolerable. More likely I'm going to buy stereo effects.
Kim:
--- Quote from: assquatch20 on January 28, 2019, 07:01:31 AM ---The pots on the stereo amp are very scratchy so they may be to blame. In certain positions it seems like it's not getting through.
--- End quote ---
I'd start right there before anything else. I've had numerous instances concerning volume levels that were not behaving properly and were simply just dirty and scratchy pots causing all the problems. :thumb-up:
Navigation
[0] Message Index
[#] Next page
Go to full version