Ideally that is all you should see at the output of the amp. He probably is correct that you are not getting the most from your amp though. You need to verify which of those types of connection is most ideal for the next item … Most stuff is around 1 -2V or so input sensitvity for full output of the amp, see what teh Mc manual wants also for best results. Measure the transfer function of the device (gain vs frequency), and then compare it to the RIAA standard curve for phono stages. 4. On other preamp models you may find a gain control (stepped or continuous) plus an output level pot, which acts like a fader (i.e. WHAT IT TELLS US. Anybody knowing about O scopes. I think most would agree, the Mac far outclasses the Sony and you are not hearing the full potential of the power amp with the Sony in the path. If not, the test or check wouldn’t be successful. If the output voltage is too high, it may overload the input of the power amp. That crackling distortion, which sounds like it’s gating, is a bad … This also shows the noisefloor of an amplifier and if it has a … Some DAC/preamps (like the dCS) have adjustable output voltages. Large Attenuator DUT (High-power amp) R1, A R2, B S11 = A/R1 S21 = B/R1 S12 = A/R2 S22 = B/R2 Dealing with high output power from high-power amplifier is a challenge. The amp does have power guard, and does not have gain controls. If you have never used an FX Loop before, you may have a few questions about what it is, how it works, and what pedals you should connect to it. Log in or register to … Those are called speaker level inputs. DC V, 10-500 and "max 500V ac/dc" 2. Usually, there are exceptions.He probably is correct that you are not getting the most from your amp though. I also think the clerk didn't understand what he was saying. It is remotely possible, in a few circumstances, for a cartridge to overload a phono stage, causing distortion. connect that to the amps and measure THOSE at the outputs. I will look at the specs on the sony and see the output rating. yet this only goes to 10 on AC. I purchased a mac 162 amp off of ebay. We have had a lot of phono preamps in our hands over the years and have been able to test it. Therefore, I wouldn't change anything myself. Problems with preamp tubes are often due to microphonics and noise issues. This will send a strong signal … OVERLOAD. If you don't have them you need to hook speaker wires to the input of the amp and that doesn't sound very clear. When we install an aftermarket radio in your dash and connect it to the amplifier, we have to make at least one adjustment to ensure everything will work properly. The salesman said I had to spend over 1000 bucks to get a good preamp to appreciate my Mac. Just causes a difference in the position of the volume control to produce a given output level from your amp. I think you might have misunderstood what the clerk was saying. It's not our place to judge that but we do show how it measures. find preamp voltage with multimeter. This arrangement takes a bit of getting used to in order to balance the channels for listening but will provide the simplest path for the audio signal. of the salesperson is lower than the voltage level from your preamp.Max output voltage from a preamp does vary from brand to brand but is rarely an issue. I did notice a big difference when I first hooked it up and can't believe what it has done to my music. The Mac has an adjustment on the back from .9 to 2.5. Im thinking when the negative and positive touched on the amp (fireworks) it shorted out the head unit. Another issue is the output voltage of the preamp and the input sensitivity of the power amp. The meter has: 1. 2) Ensure that the volume on the car stereo is almost turned up fully. A preamp output is an output from the stereo to go into the amp. We test for this possibility. It can be AUX, DVD, CD, TAPE, TUNER or any other LINE-level input that is available on your receiver. Strangely enough, people who have played the dCS Puccini CD/SACD player-cum-DAC-cum-preamp (actually it is a digital volume control), …