Harrison Labs 12 dB RCA Line Level Attenuator Pair - 2 Inch Gold RCA Cables - Audio Signal Level Adjustment for Amplifier

Perfect, just what I needed. Plugged into the back of my 80s amp, before my modern preamp and all the hum was gone!

I've spent the better part of a year trying to find a solution for the notorious clipping afflicting my Cambridge AXR100 stereo receiver in my phono setup. For a bit of context, I have an AT33EV LOMC cart connected to a an Ortofon T-30 step-up transformer, connected to a Fosi Audio adjustable-gain phono preamp, connected to the Cambridge, and audio passing through a pair of Klipsch RP600M II's. Before I acquired the passive Klipsch speakers, I owned a pair of active Kanto YU4's which (with their built-in amp) never had a problem with clipping. The Cambridge and Klipsch pair worked perfectly fine for a time until I played a few records that produced very audibly loud pops (clips) at various stages of the playback. This never happened on those same records using the YU4's, so I knew the problem wasn't with the records themselves. After some troubleshooting, I decided that my step-up and preamp were simply delivering too much voltage to the Cambridge, which thus lead to clipping in the form of very harsh, loud and unpleasant pops. While I could certainly increase the input impedance of my SUT or reduce the gain of my phono stage, I often found it simply wasn't enough to prevent certain records from piercing that clipping threshold. Additionally, the SUT really works best when the input impedance matches (or closely matches) the internal impedance of my cart (which is roughly 10 ohms). Increasing the impedance above that mark often made for very veiled, muddy and unenthusiastic sound reproduction. Needless to say, I was pretty frustrated. A recommendation on a audiophile forum lead me to these 12db attenuators, and all I can say is WOW! I plugged them in to the Cambridge RCA inputs and attached the Fosi to the female end while keeping everything else the same, and the results were spectacular. Not only did they decrease the input voltage and eliminate any trace of clipping, they did so without diminishing the audio quality whatsoever. In fact, I actually think it sounds better than before, but I need to record some comparison samples before I can say that definitively. I honestly can't praise these enough. They were exactly the solution I was looking for and they've made my record-listening experience astronomically better as a result. I've seen some folks complain about the pricing, but I honestly think they far exceed their value. If I spend thirty dollars now in exchange for a lifetime of significantly better-sounding music, I'd say that's a pretty fair trade.

O produto funcionou para o meu propósito (diminuir o sinal de entrada no amplificador) e é de ótima qualidade. Recomendo.

1970年代のビンテージアンプとCDプレイヤーのRCA接続間用に購入しました。古いアンプにとって、現在のCDプレイヤーなどからの入力は過多になってしまうので、ボリュームを適度な位置まで回せるようにするためです。可変型のアッテネータの導入も検討しましたが、余計な接点はなるべくなくした方がいいと思い固定タイプのこちらにしました。 chatgptに同様の商品を３種ほど紹介してもらいましたが、国内で見つかったのこの製品だけでした。

Appears to be very well made and does its job with no discernible degradation of the signal

プリアンプとパワーアンプの間に挟んでいます。電子制御式プリアンプのボリウム絞りすぎによりノイズが乗っていましたので挟むと静かになりました。自分のプリアンプは電子制御式とはいえ下げれば下げるほどSNが悪くなりノイズがパワーアンプから増幅されて微かに聞こえていました。これを使うことでプリアンプの美味しい所を使えるので静かでよりよい音質で楽しめています。当然最大ボリウム時の音量も下がります。デジタル表示のプリアンプであればどの程度絞り込んでいるのか分かりやすいので自分に合った減衰量も選びやすいです。アンプにゲイン調節機能がついていれば一番ですが・・・。