imhififan
Responses from imhififan
| b & w 804 s speakers are cutting at not so high volume What's happening on both speakers is rare, maybe an upstream component that's the culprit? | |
| Stereo to mono bridge/phase inverter for AVA ST70 amplifier https://skyfiaudio.com/products/electronics-service-labs-esl-bridging-amplifier-device If you are DIY handy, use a transformer is an easy way to get the job done. | |
| Accuphase A-48S @foolishman Thank you for the photo. I googled the label "HPT 3512-5" on the transformer and found the Cleem Linear Transformer 1.5VA-3512 series. You will need to replace it with a transformer rated for 230V. There are a lot of uninstalled comp... | |
| Accuphase A-48S @foolishman Sorry, I can't clearly see and identify any components in the photo due to obstruction of wires. Can you post some clearer photos showing the auxiliary transformer? Is that power switch assembly board? Thanks | |
| Accuphase A-48S Meanwhile, do you think it is OK to change only connecting J3, J6? Or do I need to change other boards like the sub-transformer board? Sorry for my ignorance, since the preamp doesn’t have a standby/power-on function, I didn’t know there was a ... | |
| Accuphase A-48S imhififan 2,219 posts 04-21-2025 at 01:50pm @foolishman Because of I don't have the preamp on hand, I can only assume it's a 100V, 120V and 230V multi-tap power transformer. The voltage settings are as follows: J1, J... | |
| Thoughts on using a smart plug on intergrated amp. I believe a switched mode 12V power supply would work with the smart plug too, the power supply I got probably would work but it takes a while to discharge so the voltage drops enough to shut the amp off. I never left it on long enough to find ou... | |
| Need help with basic electrical stuff @samureyex Without a service manual or schematic for your amp, I don't know if this is normal. I think you should check with the designer and see what he says. | |
| Need help with basic electrical stuff Check the DC voltage at the speaker output related to GND (e.g. XLR Pin1) I think the designer wants you to measure the DC voltage of speaker binding posts to ground. Turn on the amplifier, let it warm up about 15 minutes. Set the digital m... | |
| Krell FPB 700CX @ossidian5 You're welcome! You can engage the coupling capacitors by removing the jumpers. While almost any tube preamp can be safely used with a Krell power amp without the use of the input coupling capacitors mentioned above, some vintage/bouti... | |
| Search a way to find a replacement for a unison research unico pre remote control Maybe you could try the MEDION RF remote control 20017670 and use its auto-search function to see if it can control your unison Research unico. https://data2.manualslib.com/cpdf/14/66/6518/15ce36.pdf | |
| Krell FPB 700CX but the answer I am looking for is what jumpers JMP1? Is needed to put capacitors in path to potentially protect against DC. Yes. | |
| Additional Input device / router Checkout the Sony SB-700 input selector, it comes with 5 input and 3 tape loop. | |
| Accuphase A-48S I have some free time tonight, so let’s discuss some details on how to connect the transformer to 240V. Remove all the six transformer primary winding wires from the circuit board. Use a multimeter to perform a continuity test to confirm which... | |
| Accuphase A-48S @andyf Thank you for providing the transformer spec. Sorry, I don't know the output voltage of the transformer, maybe @foolishman has measurements. However, I remember there was a post from an old thread mentioned that the relay was a 18VDC re... |