Short answer: the Cambridge Audio L/R X if sound quality matters most, the PreSonus Eris Studio 8 if price matters most. The Cambridge Audio L/R X ranks #76 of 119 powered bookshelf speakers, rated 4.1/5, at $2,399. The PreSonus Eris Studio 8 ranks #99, rated 3.9/5, at $419.98, $1,979.02 cheaper.
The case for the Cambridge Audio L/R X: Active speakers with HDMI eARC, a phono input, Wi-Fi streaming, wide even dispersion, and solid bass. The tradeoff: On-axis response is less linear than the L/R S, with dips in the bass, a peak around 1-2kHz, and a dip spanning the upper mid-range into the lower treble; Cambridge confirmed the dip is a deliberate DSP notch for a tweeter breakup resonance rather than a driver flaw, but it was audible as a mild suck-out in an AB pink-noise comparison.
What the PreSonus Eris Studio 8 does well: A budget 8 inch studio monitor with XLR, TRS and RCA inputs and room adjustment controls for a conventional studio desk. Watch for: The large cabinet requires substantial desk or stand space.
Buy the Cambridge Audio L/R X if sound quality matters more than the price. Buy the PreSonus Eris Studio 8 if the price matters more than sound quality.
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Active speakers with HDMI eARC, a phono input, Wi-Fi streaming, wide even dispersion, and solid bass.
A budget 8 inch studio monitor with XLR, TRS and RCA inputs and room adjustment controls for a conventional studio desk.
Prices on this page were last checked October 31, 2026 at 7:11 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Cambridge Audio L/R X | PreSonus Eris Studio 8 | |
|---|---|---|
| Price | $2,399.00 per pair | $419.98 per pair |
| Ranked | #76 of 119 in Large Size Powered Bookshelf Speakers | #99 of 119 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 43Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) | - |
| Drivers | 28mm aluminum tweeter, 2x 5” mid-woofers, 2x 6” side-firing passive radiators | 8” (203mm) woofer |
| Frequency Response | 35Hz - 24kHz (±3dB, manufacturer specified) | 35Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 800W total (400W per speaker) | 140w Per Speaker |
| Inputs | HDMI eARC, RCA aux, RCA phono (MM), optical digital, USB-C, USB-A, Ethernet, Wi-Fi | TRS, XLR, RCA |
| Bluetooth Codecs | SBC, AAC | - |
| App | Yes | No |
| DSP | Yes, room size, wall distance, and reflective surface correction | No |
| Dimensions | 7.9” (200 mm) W x 330mm H x 260mm D (each) | 16.5”H x 9.8”W x 11.7”D (419.1 x 248.9 x 297.2 mm) |
| Weight | 22.9 lbs (10.4kg) each | 22.3 lbs (10.1 kg) each |
| Subwoofer Output | Yes | - |
| Outputs | Subwoofer | - |
| XLR Input | No | Yes |
| RCA Input | Yes | Yes |
| TRS Input | No | Yes |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | Yes | No |
| AES Input | No | No |
| Aux Input | No | No |
| Bluetooth | Yes | No |
| Bluetooth Version | 5.1 | - |
| EQ | - | Yes (Room adjustment) |
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