HiFiMan Sundara vs Sennheiser HD 660S2
105 facts in comparison
Based on 3,220 Reddit opinions. Close race—HD 660S2Sennheiser HD 660S2 edges ahead.
3.2K opinions
HD 660S2 leads by 3pts
VS
77%
B
Based on
3,450 Redditors
HiFiMan Sundara
~$179
1,748 opinions
tldr; Planar gateway drug. $300, sounds like $600. The value king that started many journeys.
Check pricesVS
Reddit's Pick
80%
B+
Based on
2,805 Redditors
Winner
Sennheiser HD 660S2
~$424.95
1,472 opinions
tldr; 660S revised. Better bass, refined sound. The current HD6X0 family pick for new buyers.
Check prices🎵SOU
😌COM
💰VAL
🔧BUI
⚡FEA
61
Points
68
Points
Score by Category
Sound Quality
74%75%
Comfort
53%70%
Value
89%22%
Build Quality
43%93%
Features
46%0%
Why is Sennheiser HD 660S2 better than HiFiMan Sundara?
- Higher Reddit score (80% vs 77%)
- Better comfort (70% vs 53%)
- Better bass (79% vs 62%)
- Better build quality (93% vs 43%)
- Latest HD6X0
- Improved bass
- Refined tuning
Based on 6,255 Reddit opinions
Too Close to Call
Reddit prefers the HD 660S2Sennheiser HD 660S2
Winning by 3 points (80% vs 77%)
Better comfort
Better bass
Better build quality
High confidence (6,255 mentions)
💬Reddit Sentiment
Based on 6,255 Reddit mentionsOverall Rating
HiFiMan Sundara
7.7/10
3,450 mentions
HD 660S2
8.0/10
2,805 mentions
COMFORT
HiFiMan Sundara5.3/10
HD 660S27.0/10
SOUND QUALITY
HiFiMan Sundara7.4/10
HD 660S27.5/10
BASS
HiFiMan Sundara6.2/10
HD 660S27.9/10
VALUE
HiFiMan Sundara8.9/10
HD 660S22.2/10
BUILD QUALITY
HiFiMan Sundara4.3/10
HD 660S29.3/10
FEATURES
HiFiMan Sundara4.6/10
HD 660S20.0/10
⚔️
Head to Head
| Topic | HiFiMan Sundara | HD 660S2 |
|---|---|---|
Comfort | 53% | 70% |
Sound Quality | 74% | 75% |
Bass | 62% | 79% |
Value | 89% | 22% |
Build Quality | 43% | 93% |
Features | 46% | 0% |
Category Wins
HiFiMan Sundara: 2|HD 660S2: 3
Head to Head
HiFiMan Sundara: 2|HD 660S2: 3
ComfortHD 660S2
HiFiMan Sundara53%
HD 660S270%
Sound Quality
HiFiMan Sundara74%
HD 660S275%
BassHD 660S2
HiFiMan Sundara62%
HD 660S279%
ValueHiFiMan Sundara
HiFiMan Sundara89%
HD 660S222%
Build QualityHD 660S2
HiFiMan Sundara43%
HD 660S293%
FeaturesHiFiMan Sundara
HiFiMan Sundara46%
HD 660S20%
HiFiMan Sundara
77%
80%
HD 660S2
HiFiMan Sundara77%
HD 660S280%
Close race - HD 660S2 edges ahead by 3 points
Key Specs
| Spec | HiFiMan Sundara | Sennheiser HD 660S2 |
|---|---|---|
| Driver Type | Planar Magnetic | — |
| Impedance | 37 Ohms | 300 ohms |
| Sensitivity | 94dB | — |
| Frequency Response | 6Hz-75kHz | 8-41,500 Hz (-10 dB) |
| Earcup Style | Open-back over-ear | — |
Key Highlights
HiFiMan SundaraWinner
💰 Insane value
🎵 Planar magic
⚠️ HFM QC lottery
👑 Budget benchmark
Sennheiser HD 660S2
✨ Latest HD6X0
🎵 Improved bass
📐 Refined tuning
💰 Premium price
Topic Battles
HiFiMan Sundara: 2|Tied: 1|HD 660S2: 2
🎵Sound Quality
HiFiMan Sundara
74%
HD 660S2
75%
😌Comfort
HD 660S2 winsHiFiMan Sundara
53%
HD 660S2
70%
💰Value
HiFiMan Sundara winsHiFiMan Sundara
89%
HD 660S2
22%
🔧Build Quality
HD 660S2 winsHiFiMan Sundara
43%
HD 660S2
93%
⚡Features
HiFiMan Sundara winsHiFiMan Sundara
46%
HD 660S2
0%
Based on Reddit sentiment across 5 categories
📈Where They Rank
💬What Redditors Actually Say
What Redditors Say
Best praise vs top criticism for HiFiMan Sundara
Best Praise
+190 pts“Wife asked me what I wanted for Xmas and I was looking at the closed back sundara as a possible replacement for my HD569 for use on the Sofa. So sent it over but she stated she’d already gotten me my big present. So figured I would try and pick them up in January. But then this arrived. Nice surprise, looking forward to trying them out!”
r/headphones
ViewTop Criticism
+85 pts“I ordered a brand new (supposedly) pair of Sundaras from HiFiMan's Amazon store, and upon opening the box I noticed white dusty stuff on the open back of the headphones, in the finer mesh material. I knew HiFiMan has a reputation for QC issues but I was not expecting *mold*. I contacted customer service about it and sent photos and microscope images. Here's hoping they have a good response. Definitely disappointed but I guess that's the risk you take.”
r/headphones
View3 more quotes available below
Sentiment Over Time
HiFiMan Sundara
Sennheiser HD 660S2
📈Historical Price Data
HiFiMan Sundara
Sennheiser HD 660S2
HiFiMan Sundara
All-time low: $159(2025-11)
Sennheiser HD 660S2
All-time low: $372.21(2023-07)
$14 below 90-day avg
Which is Better?
Sennheiser HD 660S2 Wins
80%
660S2
vs
77%
Sundara
Close race, but Sennheiser HD 660S2 edges ahead by 3 points based on 6,255 Reddit opinions.
Why HD 660S2Winner
- ✨ Latest HD6X0
- 🎵 Improved bass
- 📐 Refined tuning
Why HiFiMan Sundara
- Better Value for Money (89% vs 22%)
- Better Features (46% vs 0%)
❤️The Love/Hate Breakdown
Sentiment Breakdown
42%Positive
Positive
42%Neutral
48%Negative
10%Based on 2,805 Reddit opinions
Sentiment Breakdown
39%Positive
Positive
39%Neutral
50%Negative
11%Based on 3,450 Reddit opinions
Frequently Asked Questions
Which is better, Sennheiser HD 660S2 or HiFiMan Sundara?
Based on 6,255 Reddit comments, Sennheiser HD 660S2 has a slight edge with 80% positive sentiment vs HiFiMan Sundara's 77%. The difference is small, so both are solid choices.
Should I buy Sennheiser HD 660S2 or HiFiMan Sundara?
Both have similar approval ratings (80% vs 77%), so focus on specific features, pricing, and what matters most to you.
What do Redditors love about Sennheiser HD 660S2?
Reddit users highlight: Latest HD6X0. Improved bass. Refined tuning. With 2,805 mentions and 80% approval, it's a well-regarded choice in the community.
What do Redditors say about HiFiMan Sundara?
Reddit users highlight: Insane value. Planar magic. HFM QC lottery. With 3,450 mentions and 77% approval, it remains a popular alternative.
How many Reddit reviews were analyzed?
This comparison analyzed 6,255 Reddit comments: 2,805 about Sennheiser HD 660S2 and 3,450 about HiFiMan Sundara. Data was sourced from headphones community discussions.
How accurate are these ratings?
Our sentiment analysis is approximately 80-85% accurate compared to manual review. Well-discussed products with many mentions tend to have more reliable scores than niche items with fewer data points.
Why trust Reddit over professional reviews?
Reddit users bought products with their own money and have no incentive to mislead. You're seeing hundreds of real opinions across different use cases, not just one reviewer's take. This crowdsourced approach surfaces both common praise and recurring complaints.
3,220 Reddit opinions analyzed · Last updated 7/21/2026