Skip to main content

HeadroomUsed headphones

Open-back Electrostatic Browse Guides

Loading…

HeadroomUsed headphones

About How we work Disclosure Browse Guides

Part of allbutnew. A second opinion on secondhand.

Headphones to sell? Get an offer

No affiliate links. We earn nothing. We only recommend what we'd buy, and we'd rather you buy used. Prices change often, so check the seller’s listing before you buy. We run no analytics and set no tracking cookies. We aren’t affiliated with any headphone maker, and all trademarks belong to their owners.

Browse every headphone

Every model we cover, from Sennheiser and Beyerdynamic studio classics to Koss, Grado and Stax electrostatics. Filter by maker, type, era and what it takes to drive them, then open any one for its history, what to check and what should come with it.

Maker

Sennheiser
AKG
Beyerdynamic
Koss
Stax
Grado

Type

Open-back headphones
Closed-back headphones
Electrostatic headphones

Drive it from

Plays from a phone
Wants a headphone amp
Runs off a speaker amp
Needs an energizer

Era

1930s
1960s
1970s
1980s
1990s

Min $Max $Sort

29 models · page 1 of 2

AKG
Open-back
AKG K 1000
Years made
1989–about 2004
Impedance
120 ohms
Drive it from
Runs off a speaker amp
Specs and what to check →
AKG
Open-back
AKG K 140 S
Years made
1980–1982
Impedance
600 ohms
Drive it from
Wants a headphone amp
$65–$180 typical ask
5 on eBay
AKG
Open-back
AKG K 240 Monitor
Years made
1984–2004
Impedance
600 ohms
Drive it from
Wants a headphone amp
$80–$210 typical ask
13 on eBay
AKG
Open-back
AKG K 240 Sextett
Years made
Late 1970s–1984
Impedance
Not documented
Drive it from
Wants a headphone amp
$240–$260 typical ask
6 on eBay
Beyerdynamic
Closed-back
Beyerdynamic DT 100
Years made
Late 1960s–today
Impedance
400 ohms
Drive it from
Wants a headphone amp
$120–$360 typical ask
12 on eBay
Beyerdynamic
Closed-back
Beyerdynamic DT 220
Years made
c.1976–1980s
Impedance
400 ohms
Drive it from
Wants a headphone amp
$60–$80 typical ask
2 on eBay
Beyerdynamic
Closed-back
Beyerdynamic DT 48
Years made
1937–2012
Impedance
5 or 25 ohms
Drive it from
Plays from a phone
$200–$280 typical ask
5 on eBay
Beyerdynamic
Open-back
Beyerdynamic DT 880 (1980s)
Years made
1980–1989
Impedance
600 ohms
Drive it from
Wants a headphone amp
$170–$260 typical ask
5 on eBay
Beyerdynamic
Open-back
Beyerdynamic DT 990 PRO
Years made
1985–today
Impedance
600 then 250 ohms
Drive it from
Wants a headphone amp
$110–$160 typical ask
82 on eBay
Grado
Open-back
Grado SR125 (original)
Years made
c.1994–2008
Impedance
32 ohms
Drive it from
Plays from a phone
$140–$150 typical ask
1 on eBay
Grado
Open-back
Grado SR325 and SR325i Gold
Years made
Mid-1990s–2008
Impedance
32 ohms
Drive it from
Plays from a phone
$250–$290 typical ask
5 on eBay
Grado
Open-back
Grado SR60 (original)
Years made
1994–2008
Impedance
32 ohms
Drive it from
Plays from a phone
$55–$120 typical ask
4 on eBay
Grado
Open-back
Grado SR80 (original)
Years made
c.1994–2008
Impedance
32 ohms
Drive it from
Plays from a phone
$95–$120 typical ask
4 on eBay
Koss
Closed-back
Koss A/250
Years made
Not documented
Impedance
Not documented
Drive it from
Wants a headphone amp
Specs and what to check →
Koss
Electrostatic
Koss ESP/950
Years made
1990–today
Impedance
Not rated
Drive it from
Needs an energizer
Specs and what to check →
Koss
Open-back
Koss HV/X
Years made
1980s
Impedance
Not documented
Drive it from
Wants a headphone amp
$55–$60 typical ask
1 on eBay
Koss
Open-back
Koss Porta Pro
Years made
1984–today
Impedance
60 ohms
Drive it from
Plays from a phone
$50–$85 typical ask
27 on eBay
Koss
Closed-back
Koss Pro/4AA
Years made
1970–late 1980s, and again since
Impedance
250 ohms
Drive it from
Wants a headphone amp
$45–$90 typical ask
97 on eBay
Sennheiser
Open-back
Sennheiser HD 414
Years made
1968–1990s
Impedance
2,000 ohms
Drive it from
Wants a headphone amp
$160–$200 typical ask
6 on eBay
Sennheiser
Open-back
Sennheiser HD 424
Years made
1973–1980s
Impedance
2,000 ohms
Drive it from
Wants a headphone amp
$130–$200 typical ask
6 on eBay
Sennheiser
Open-back
Sennheiser HD 520 II
Years made
Early 1990s
Impedance
600 ohms
Drive it from
Wants a headphone amp
$100–$110 typical ask
1 on eBay
Sennheiser
Open-back
Sennheiser HD 540 Reference
Years made
1985–1992
Impedance
300 ohms
Drive it from
Wants a headphone amp
$220–$240 typical ask
2 on eBay
Sennheiser
Open-back
Sennheiser HD 560 Ovation
Years made
1989–early 1990s
Impedance
300 ohms
Drive it from
Wants a headphone amp
Specs and what to check →
Sennheiser
Open-back
Sennheiser HD 565 Ovation
Years made
1996–2001
Impedance
160 ohms
Drive it from
Plays from a phone
$75–$120 typical ask
4 on eBay