audioengine p4

A sweet-sounding USB digital amplifier for headphones and speakers

The nice folks at Parts Express sent over an amazing-sounding little amplifier, the $129 Topping TP30. It's a tiny desktop Class T amp design, with one analog RCA stereo input and one USB connection (the TP30 has a built-in digital-to-analog converter). The amp delivers 15 watts per channel to 4 ohm-rated speakers (10 watts into 8 ohms), and has a 3.5 mm headphone jack on the front panel.

With its extruded aluminum chassis, 8mm thick, CNC-machined front panel, and solid-metal volume control knob the TP30 wouldn't look out of place in a high-end system. It even feels expensive, but I have just one nitpick: the illuminated blue LED ring surrounding the volume control knob is too bright. I wish there was a way to dim it or turn it off. The amp measures a tidy 4.13 inches by 1.77 inches by 8.07 inches.

The USB interface utilizes standard Windows audio class 1 drivers (it worked fine with my Mac mini). Internal parts quality is superb; the TP30 boasts Elna capacitors, Dale resistors, and an ALPS volume control. The Burr-Brown USB digital-to analog converter chip accepts up to 48 kHz sampling rates with 16-bit resolution.

I compared the sound of the TP30 with my Audioengine N22 amp ($199), and they're both pretty good. The N22 has a fuller, warmer tonal balance, but the TP30 has a more immediate, detailed sound with more tightly controlled bass. I used my Audioengine P4 speakers for all of my speaker-based listening tests. It's interesting, the TP30 is a digital amp and takes digital signals "straight-in" via its USB port; the N22 is analog-only and is a more traditional Class A/B amplifier design. It sounded softer, and a wee bit less defined than the TP30.… Read more

Audioengine's nifty $199 desktop amplifier

Audioengine's spectacularly good A2 has been my powered speaker reference for years. I recently enthused about Audioengine's slightly larger passive P4 speaker ($249/pair) that need to be powered by a separate amp. I was surprised that Audioengine didn't introduce an amp when they brought out the P4, but now with the N22 ($199), the time has come.

It's an unobtrusive, vertically oriented design--7 inches high, 2.75 inches wide, and 5.5 inches deep--and it weighs 3.5 pounds. The clean front panel has just a volume control and a 3.5mm headphone jack; the … Read more

Audioengine P4: The little $249 speaker that could

The Audioengine P4 is a cheap speaker.

Correction, it's an audiophile speaker that sells for $249 a pair. But that hasn't stopped it from getting raves from audiophiles who live with speakers that sell for a whole lot more.

I use Audioengine A2 self-powered speakers ($199 a pair) with my computer, so I thought I had a handle on what to expect from the P4.

I did not; it's a whole new ball game. First, the P4 is a "passive" speaker, so you need to hook it up to an amplifier or receiver. The A2 is an "active" self-powered design that can be connected to a computer or MP3 player via a headphone jack.

I started listening to the P4 with my computer, with the speakers hooked up to an old Jolida hybrid tube/solid-state amplifier. The A2 is a sweet sounding little speaker, but the P4 was dramatically clearer, cleaner, and more vibrant. The P4 blows the A2 away--it's not even close.

At 9 inches tall by 5.5 inches wide by 6.5 inches deep, the P4 looks like a larger A2 (the A2 is 6 inches high by 4 inches wide by 5.25 inches deep). The P4 comes in satin-finished black or gloss white paint for $249 a pair, or in bamboo for $325 a pair. The wood isn't merely a veneer over medium-density fiberboard; no, the P4's cabinet is made out of solid bamboo, it's gorgeous!

Audioengine offers a nifty tabletop stand, the DS1 ($29 a pair), that cants the speaker back at an angle to project sounds up. The rubbery stands also isolate the speaker and prevent it from transmitting bass into your desk. Want to wall mount it? No problem, use the threaded inserts on the speaker's rear-end.

The P4's three-quarter inch silk dome tweeter and 4-inch Kevlar woofer appear to be of very high quality. Both drivers are made by Audioengine. … Read more