Monoprice SSVC-4.1 Single Input 4-Channel Speaker Selector with Volume Control, Impedance Protection, Individual Zone On/Off Buttons, Black, Model Number: 138159

I have ceiling speakers and wall speakers that have different impendances in 3 separate areas. This solved both the impedance issues and the switching and distribution problems nicely. The product details were accurate, however I was concerned about one of the pictures that shows speaker outputs -use 8 ohm speakers, and I included that because I think it needs to be changed. However the, documentation clearly states that 4 ohm to 8 ohm are acceptable (100 watts/channel continuous power handling capacity, 200 watts/channel peak. 5-ohm minimum amplifier impedance with four 4-ohm speakers selected, 6-ohm minimum with 8-ohm speakers). That is different from many other inexpensive speaker selectors with volume control. I really liked how the speaker wire is attached, the removable attachments that plug back in are easy to work with and make wiring simple. The Volume control is incremental but with numerous (more than 10) increments, and sounds smooth when changing volume. The product itself is heavy, construction on the outside was non-obtrusive and feels substantial. I am very pleased with the product, and highly recommend it

muy bueno y practico

This item was a Amazon repack. The box was beaten but the the unit was flawless and worked as it should. It was a pain adding wires for four pairs of speakers into the L & R output on the back of my amp. This device not only cleaned up the mess at the back of my amp for the speaker connections, it has volume and on/off control for each channel. I do believe the sound output in each room has improved as well. I was concerned about the impedance matching and it was a non issue. I continue to use my my impedance matching volume controls on the wall in each room, now set to 1 pair and not 4 pairs of speakers. Don’t really need the controls in each room now but they fill the hole in the wall.

音が出るまで苦労しました。この商品の特性として、セレクターで抵抗が増加するためセレクター側はボリュームを目一杯回したものに対しアンプは最小のボリュームから調整する。1組のスピーカーをつないで確認するのがポイントです。海外製ですが、同時出力できて複合インピーダンスの調整ができるので購入しました。 確かに日本版マニュアルにもセレクター側はボリュームをマックスと書いてありました。

Unit worked perfectly and produced good sound without external power supply requirement.