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JBL LSR308

2-way powered studio monitor with 8" woofer and 1" tweeter

9 Reviews | 1 question - 2 answers

Item # 855308

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Overview

Our take on the JBL LSR308

JBL approached the design of the LSR308 with new ears, but they built the monitors on solid, proven technology. Each speaker matches an 8" long-throw woofer with a 1" damped woven composite Neodymium tweeter to reproduce powerful transients and microdynamics in your mix. JBL's LSR Linear Spatial Reference design criteria requires seventy-two measurements yielding more than 1,200 times more data, enabling JBL to engineer a speaker that ‘sounds right' in any working space. The patented Slip Stream™ bass port uses a double-flared shape for greater low-frequency extension and less internal turbulence. That's crucial when you need to hear accurate low tones from the 8" woofer.

History meets innovation

JBL approached the design of the LSR308 with new ears, but they built the monitors on solid, proven technology. Each speaker matches an 8" long-throw woofer with a 1" damped woven composite Neodymium tweeter to reproduce powerful transients and microdynamics in your mix. JBL's LSR Linear Spatial Reference design criteria requires seventy-two measurements yielding more than 1,200 times more data, enabling JBL to engineer a speaker that ‘sounds right' in any working space. The patented Slip Stream™ bass port uses a double-flared shape for greater low-frequency extension and less internal turbulence. That's crucial when you need to hear accurate low tones from the 8" woofer.

JBL LSR305 5" 2-way powered studio monitor

JBL's 8" 2-way LSR308 powered monitor provides big-time sound in a compact design.

Built to deliver accurate sound — and to last

Separate 56-watt Class D amplifiers drive the woofer and tweeter, so highs, mids and lows are delivered with dynamic accuracy for even the most demanding production styles. Durable balanced XLR and 1/4" TRS connectors ensure that pure, high-quality signal flows from the source to your ears. Just using quality materials and sturdy craftsmanship isn't enough for the engineers at JBL. Before each speaker leaves the factory it must pass a torture test: playing at full output for 100 hours without failure. And each is backed by a five-year warranty. Rest assured: your LSR308 monitors will deliver years of reliable, responsive performance.

A high-tech pedigree

JBL has been building speakers for over 65 years, and they continue to push boundaries in pursuit of great sound. Their Linear Spatial Reference (LSR) design process measures output in a field 360 degrees around the speaker and engineers the entire system to ensure accurate off-axis response. They also adapted the Image Control Waveguide from JBL's flagship M2 Master Reference Monitor to the compact design of the LSR308. That means you're getting the best mix, and the truest sound possible, no matter where you're sitting.

You're in charge of what you hear

In your studio, you're the boss. The LSR308 allows you to fine-tune the sound to fit your room's acoustics and your personal preferences. Boost or cut frequency response as needed with separate three-position low- and high-frequency trim switches. A -10 dB/+4 dB sensitivity switch ensures compatibility with a broad range of signal sources, allowing you to connect high output professional gear without any danger of input overload.

It's your mix. JBL has gone to great lengths to make sure you hear what you need to hear when you're sitting in the sweet spot.

Product Highlights:

  • separate 56-watt Class D amps power woofer and tweeter in bi-amped design (112 watts total)
  • frequency response: 37-24,000 Hz
  • peak SPL: 112 dB
  • 8" long-throw woofer in bass reflex enclosure
  • 1" soft dome damped woven composite Neodymium tweeter
  • -10 dB/+4 dB sensitivity switch ensures compatibility with a broad range of signal sources
  • low frequency trim switch (+2 dB, 0, -2 dB)
  • high frequency trim switch (+2 dB, 0, -2 dB)
  • balanced XLR and 1/4" TRS inputs
  • JBL's patented Slip Stream™ low frequency port design
  • 10"W x 16-1/2"H x 12"D
  • weight: 22 lbs.
  • warranty: 5 years parts and labor
  • Our 60-day money-back guarantee

What's in the Box:

  • Powered studio monitor speaker
  • AC power cord
  • Owner's Manual

These speakers sound incredible. I am using them in a surround system, they are the front left and right and center. The rears are lsr305' which are astounding as well. These are replacing some older JBL monitors. I am driving them with a Marantz peamp /processor in balanced mode.

John, Pittsford, NY

Reviews

JBL LSR308 Reviews

Average Customer Review(s):

(9 Reviews)

JBL LSR308

Ben from North Canton, OH on 3/28/2018

Crutchfield Customer Review (What's this?)

These are great monitors. If you are looking for heavy, booming bass, they are NOT for you. But if you want to hear the bass along with everything else, they do the job easily. I've thrown everything at them; classical, metal, jazz, rock, electronica, etc. Everything sounds full and clean. The range of these JBL's is fantastic. I'm using them as my home office desktop speakers. I may try them on my main stereo since they are so good. I"m interested to see how they sound with vinyl. I need to also test them with my keyboard, but am sure I would definitely use them instead of a giant amp for solo gigs.

Pros: Everything sounds good The bass is present without overpowering other frequencies

Cons: Big size (for my desk) Sometimes I'd like to really feel the bass

Beautiful sound

John from Pittsford, NY on 5/5/2017

Crutchfield Customer Review (What's this?)

These speakers sound incredible. I am using them in a surround system, they are the front left and right and center. The rears are lsr305' which are astounding as well. These are replacing some older JBL monitors. I am driving them with a Marantz peamp /processor in balanced mode.

Pros: As I said the sound is incredibly excellent

Cons: can't think of any

JBL LSR308

Anonymous from Santa Rosa, CA on 4/16/2017

Crutchfield Customer Review (What's this?)

These JBL speakers deliver great sound from booming bass to crisp highs, using solidly build speaker cones in a sturdy enclosure. I'm using them with a Roland Fantom X-8 synthesizer and they sound awesome!

Pros:

Cons:

JBL: a great choice

James from La Jolla, CA on 12/31/2016

Crutchfield Customer Review (What's this?)

Excellent monitors: deep full bass, mid- and high-range clean and clear. And they are quiet, even at full volume. A great choice.

Pros:

Cons:

JBL LSR308

Kirk from buford, GA on 2/25/2016

Crutchfield Customer Review (What's this?)

I am using them as Computer speakers to my Laptop with iso acoustics stands, and a Dragonfly DAC w/jitterbug attached. The Sound is what I consider Full Range and play as loud as I want. These JBL's are nice and clear fed with 24/96k High Definition FLAC files. No grilles on these units.

Pros: JBL sound quality.

Cons: These Bookshelf speakers can take Desk space, but I feel they are worth it. So not really a con.

Excellent

Darcy from Florida on 7/20/2015

Crutchfield Customer Review (What's this?)

I would recommend this

Pros:

Cons:

Excellent

ptbuzzcut from Pennsylvania on 5/26/2015

Crutchfield Customer Review (What's this?)

Purchased 4 to use with Hauptwerk VTPO (virtual organ software). Great sound. Easy to setup

Pros: Nice looking, great sound, easy to connect to audio source

Cons: None that I have seen

Beautiful sounding monitors

Matt B. from Phila, PA on 3/6/2014

Crutchfield Customer Review (What's this?)

I purchased these monitors for my home recording studio. Big difference in sound compared to my old monitors. Very wide sound field, crisp clear highs, tight bottom end. I record a lot of analog synths so my monitors need to handle extreme highs and very subsonic lows. So far the LSR308 have taken anything I have thrown at them with great results. With the 8" woofer you almost don't need a sub but they do sound better with a sub in the system.

Pros: Great wide sound field, solid build.

Cons: I wish they had RCA inputs because my sub only has RCA inputs & outputs. A TRS to RCA adapter fixed that problem.

Nice Surprise

Brian NC from DTR, NC on 3/4/2014

Nice surprise given the price point, especially the intro sale price. Listening midfield, running the 308s through a Focusrite Scarlett 2i2 hooked via USB to MBP w/iTunes. Great reviews on web re. 305 & 308 but went with the 308 to avoid having to include a sub down the road. Glad I did as these sound great and continue to surprise me as they break in. Can't compete w/ Adams, ATC, etc. but at 1/4 the price they give it a go. So for SQ a solid 4 stars, but for value an easy 5 star rating.

Pros: Great into price, v. good reg. price. Detailed sound top to bottom. As always, great service from Crutchfield.

Cons: These things are big! Crutchfield did not have lots of options for cables & interfaces so had to go to local store. That should change as they ramp up their pro lines.

Details

Hands-on research

Features and Specs

General
Woofer Size (inches) 8
Tweeter Size (inches) 1
Midrange Size (inches) 0
Full range Driver size 0
Enclosure type Bass Reflex
Built in amplifier Y
RMS Power rating 112
Peak Power rating Not given
Inputs XLR, 1/4" TRS
Parts warranty 5 Years
Labor warranty 5 Years
Width (inches) 10
Height (inches) 16-1/2
Depth (inches) 12
Weight 22 lbs
Frequency Response 37-24k
Maximum Peak SPL 112

Product Research

Features

Two-Way Design: The JBL LSR305 powered studio monitor employs a two-way driver design with an 8" long-throw woofer and a 1" soft-dome Neodymium tweeter. These drivers deliver impressive deep bass and smooth high frequency response beyond the range of human hearing.

Image Control Waveguide: The studio monitor's 1" soft-dome tweeter is coupled to JBL's Image Control Wave Guide. The patent-pending design of the Image Control Waveguide precisely  controls the sound emanating from the speaker in the vertical and  horizontal planes ensuring the presentation at the listening position is neutral and accurate.

Slip Stream Port Design: The LSR305 features a bass reflex enclosure with a unique rear-firing port. JBL's Patented Slip Stream low frequency port design works in concert with the woofer to produce deep bass response at all playback levels. The double-flared shape of the port is precisely engineered for greater low-frequency extension and reduced turbulence.

Class D Amplification: Two efficient 56W Class D Amplifiers (one for the lows, the other for the highs) provide abundant power to deliver the output and dynamic headroom needed for the most demanding production styles.

Balanced Inputs: Balanced XLR and 1/4" TRS inputs give you the options you need to connect the powered studio monitor to any signal source while maintaining professional signal quality.

Select Input Sensitivity: The -10 dB/+4 dB sensitivity switch ensures compatibility with a broad range of signal sources, allowing you to connect the LSR305 to high output professional gear without any danger of input overload.

LF (Low Frequency)/HF (High Frequency) Trim: Trim switches for both the Low and High Frequencies give you excellent control over the studio monitor speaker's sound in your type of application and room environment. Use these switches fine-tune the amount of bass and treble you hear to compensate for room acoustics, program material, and your personal taste.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Best combination of size/weight and performance for a high quality portable music recording studio. [ David  Aug 30, 2017 ]
Needed a pair of Studio Monitors. [ E Soren  Oct 06, 2016 ]
My friend is an audio engineer. Listening to the nearfield monitors at his work nearly caused a brain-explosion. Everything was *SO* articulate and clean, the stereo image and soundstage was amazing. I told him I wished my home computer setup sounded half as good. He told me to just go get some studio monitors. The speakers are self-amplified, and a good USB DAC with TRS/XLR outputs can be had fairly cheaply. SO I DID! I demo'd these at a local pro-audio shop first. (YOU SHOULD TOO!) [ Brent  Jun 01, 2016 ]

1 question already asked

I can't say absolutely not because I haven't tried connecting them to a home stereo receiver. The 308s are Powered speakers, they each have their own amplifier. Think of them as a kind of guitar amplifier, they each have a TRS 1/4" audio input jack (and XLR connector) for an audio source from a mixing console or preamp. They do not have bare-wire connectors like home stereo speakers and stereo receivers like your Sony have. I don't believe an audio cable exists with a 1/4" male jack on one end bare wires on the other, but that is what you'd need to connect the Sony to the JBLs. [ James  Apr 06, 2017 ]
You don't need powered monitors with a receiver [ Stephen  Apr 05, 2017 ]
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