A few weeks ago, I met a very nice gentleman who was a distributor of this product. I had never heard of PSB let alone the M4U 2 and I was given the opportunity to demo this product. A very big thanks to John of Lenbrook Asia for this opportunity.     On The Head   Isolation - average. Maybe similar to the LP2  for my sized head. The Ed8s & Signature Pros isolate more. Whilst the clamping force though somewhat akin to the Ed8s & Signature Pros. It's weight on the head though is heavier than the aforementioned headphones...

    The Hd-Q7 are Ortofon's desktop amp powered by a 16V power pack. It takes in a switchable single ended 3.5mm or L/R RCA unbalanced input at the back and provides 6.3mm or 3.5mm unbalanced output. The volume knob is probably the most prominent feature at the top. Dialling the volume knob is extremely smooth yet firm. There's no chance of accidentally turning the volume up or down. Since it's large, it's easy to be precise.       The overall construction is very solid and presentation is simple and with very clean lines...

  This review will have a lot of references to the e-Q5 which will be explained later.   As with the e-Q5, the e-Q7 is also an easy-to-drive low impedance single balanced armature designed by Ortofon. In fact it's the same balanced armature as the e-Q5. The main difference between the e-Q5 and the e-Q7 is the pure silver plated cables as opposed to e-Q5's OFC cables.   The e-Q5 review can be found here :-   http://www.head-fi.org/products/ortofon-e-q5/reviews/6953   Again, like the e-Q5, the presentation and the packaging of the...

  The Ortofon e-Q5 is an easy-to-drive low impedance single balanced armature driver designed by Ortofon themselves. It uses OFC cables and the shells are aluminium CNC-ed.   As with most Japanese products, presentation is important and the e-Q5 doesn't disappoint. It comes in a nice cylindrical can with a multitude of accessories - tip cleaner, flanges/tips of various sizes, and filter replacements too.     The e-Q5s retail approx Y13,800 (USD$175) online, and probably a tad more in a bricks 'n mortar shop. For that price though, its...

  Go-DAP 4.0 OpAmp Comparison Review   Brief History For the past few weeks I've had a couple of Go-DAP 4.0s on loan for a review. Some of you may know that in the past 6-7 months I've had bought a couple of Go-DAPs, upgraded them, then got rid of one. I started off with the Muses 8820E first back in early October and very soon after the BurrBrown OPA2134. Then VentureCraft announced they were providing upgrades to the OpAmps offering 3 versions, OP-275, AD8397, and OPA-2604. I upgraded one Go-DAP to the OP-275, and another to the AD8397.  ...