If you're Erin..... It depends on what you want...Judging by Erin's review and objective measurements, the AsciLab C6B is an easy choice.
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If you're Erin..... It depends on what you want...Judging by Erin's review and objective measurements, the AsciLab C6B is an easy choice.
You should listen to them before you get involved with this rabbit hole..... Tune this thread out and fire them up...I would be interested in Ascend's response too. I bought these speakers specifically for their claimed high SPL capability, combined with the neutrality of the regular Sierra, and they just arrived and are sitting in the box next to me. I'll obviously try them out myself, but would be disappointed if they turned out to have audible distortion. I don't listen as loud as Erin (woo... 80dB A weighted is a lot), but I was hoping to use them in a new house I will getting in the future with a long room connected to the kitchen, and turning them up loud for that. I'll be running them with a sub crossed over at 80Hz though, so maybe it won't be a big deal.
Yes, Erin's picking nits here... And that's ok...but it sure has created some hysteria. Lol... There are some great options around this price point from the s1v2 all the way up to the $1500 range...this speaker can hang with any of them depending on what the consumer wants..I never noticed the midrange distortion or limited output. I did prefer them in my living room over the revel m106 and C6B (especially when ran full-range) so take it for what it's worth.
Yes I’m listening to them now, they’re actually pretty great, and I’m not noticing any distortion. I lowered my crossover to my sub to 60Hz. I’m coming from Dennis Murphy AAAs and the LXes are capable of a lot more output before getting “congested”. Would like to get his Spinorama data though to try the EQ. The AAAs have this perfect midrange that I’m missing. My REW measurements show the LX as a bit bumpier in the mids than the AAAs, so probably not my imagination. The low mid punch of the LXes are impressive though. They are a lot bigger and sound bigger, but maybe I’m imagining that. HahaYou should listen to them before you get involved with this rabbit hole..... Tune this thread out and fire them up...
These and the BMR’s are two of the most highly regarded speakers in this price rangeYes I’m listening to them now, they’re actually pretty great, and I’m not noticing any distortion. I lowered my crossover to my sub to 60Hz. I’m coming from Dennis Murphy AAAs and the LXes are capable of a lot more output before getting “congested”. Would like to get his Spinorama data though to try the EQ. The AAAs have this perfect midrange that I’m missing. My REW measurements show the LX as a bit bumpier in the mids than the AAAs, so probably not my imagination. The low mid punch of the LXes are impressive though. They are a lot bigger and sound bigger, but maybe I’m imagining that. Haha
You guys shouldn't take Erin's thoughts too seriously here... He really didn't pan them hard, they are the next upgrade from the s1v2 that he raved about...built from the same tweeter a better woofer, same cabinet , by the same designer using the same tech to design.... Does anybody think this is going to be a bust?
I agree.. with this: if *I* were going to get sierra's at full retail I think i'd go with the s1v2 based on value..but.. this speaker is certainly better at a few things (ability to go "deep" being one)...Erin's demeanor is a good observation, he obviously had issues with driver malfunction (that was corrected) he may well have been a bit frustrated with the entire thing this time around... but , if you listen to what he actually said it wasn't a hard pan....he even referred to this at the beginning of the vid (iirc)...Maybe some are reading too much into Erin's demeanor. He seemed much more upbeat about the S1 V2s but as you said, look at the data and this is essentially the same speaker with a more robust woofer. The S1 doesn't show quite as much multitone distortion as the LX in the specific region being discussed, but is that enough to be audible to any appreciable extent? The price difference is $600 per pair, so as is the almost always the case when you climb up within a model line, diminishing returns will apply.
If you saw Erin's review, then you need to read Dave's initial response.View attachment 475536
LMM summary of the key points from the Ascend Audio Sierra LX speaker review video (with timestamps):
- (00:00) Introduction: The Ascend Audio Sierra LX speaker review—list price about $1,600—specs include an 8 Ω nominal impedance, 350 W max continuous power, cabinet made of internally braced 20 mm laminated bamboo.
- (00:26) Design: Vented cabinet with flared rear port; customized Titan dome tweeter; proprietary 6-in woofer by Seas of Norway.
- (00:58) Setup nuance: Direct on-axis listening can sound lacking in upper mid-range; slightly toe-out (10–20° off-axis) brings more clarity and presence—particularly helpful in large rooms with minimal sidewall reflections.
- (02:46) Tonal balance and efficiency: Very neutral sound with bass extending to ~40 Hz, but sacrifices sensitivity—measured around 81 dB @ 2.83 V/1 m.
- (03:36) Amplifier demands: Due to low sensitivity, these speakers require a powerful amplifier. Mid-range distortion becomes audible at moderate listening levels (~82–83 dB at 10 ft).
- (04:50) Soundstage: Wide radiating pattern (~±60°), balancing enveloping experience and decent imaging; sweet spot depends on room and listener preference.
- (06:08) Listening height matters: Significant tonal shift if the listener’s ears are not at tweeter height—typical two-way bookshelf speakers don’t usually have this sensitivity.
- (06:38) Amp-dependency: Speakers’ response can vary by ~2 dB in mid-range depending on amplifier output impedance/damping factor—older or high-impedance amps may alter the sound.
- (08:19) Frequency response: In-room measured F3 around 47 Hz, F10 ~38 Hz. Flat ±1.5 dB aside from a pronounced notch near 3.5 kHz.
- (09:36–10:20) Manufacturer transparency: The reviewer contacted Ascend’s owner about measured discrepancies. The owner provided replacement woofers, addressing issues noted in the video’s CA-2034 measurements.
- (11:17–12:27) Distortion & SPL limits: Mid-range distortion increases notably at elevated SPLs. Using a subwoofer (crossover ~80 Hz) reduces compression issues; short-term compression insignificant under ~96 dB.
- (12:50) Impedance and amplifier load: Minimum impedance ~5.5 Ω, close to the nominal 8 Ω, so most amps handle the electrical load—though low efficiency remains a factor.
- (13:38) Amplifier influence: High-impedance amps can shift the speaker’s frequency response by up to ~2 dB mid-range and ~1.5 dB in highs—low-output-impedance, high-damping amps yield more accurate results.
- (14:09–14:36) Tolerances: Two units measured showed up to 3 dB variation at 20 kHz—driver tolerance is typical for this price and finish level—reviewer emphasizes he did due diligence.
Overall Verdict: These Ascend Audio Sierra LX speakers deliver a neutral, extended bass performance but demand thoughtful setup and robust amplification. Critical setup considerations include toe-in angle, listening height, and careful pairing with a capable amp to avoid distortion and preserve tonal fidelity. If driven properly and positioned well, they offer a rewarding listening experience, though their low sensitivity and mid-range distortion at higher SPLs may limit appeal for those seeking louder playback or using low-powered systems.
I've noticed some posts are being removed, which is disappointing. As a Sierra LX owner, I was drawn to the brand for its small-company ethos and the owner's open, transparent engagement with the community.If you saw Erin's review, then you need to read Dave's initial response.
The short of it is, Erin's review of the LX raises some eyebrows, mine included after reading this.
https://www.audiosciencereview.com/...nd-acoustics-owners-lounge.63080/post-2420336I've noticed some posts are being removed, which is disappointing. As a Sierra LX owner, I was drawn to the brand for its small-company ethos and the owner's open, transparent engagement with the community.