Are these subs good for low notes?

They are awesome for low notes. Huge magnet, stiff cone.

Is this the price for both Massive Audio subs?

Summo124 subs are sold individually not in pairs.

Hiphonics Brutus 3000 amp capable pushing these 12’s ?

If you have 2 of these subwoofers I would suggest the Massive Drago 6K amplifier. they are underrated and will push minimum 3000 watts RMS @ 1 Ohm.

Are these better than x-12 v.2 d4 - sundown audio 12" 1500w rms dual 4-ohm x v.2 series subwoofer ?

No. Hell no!!!! And I don’t even like Sundown

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Massive Audio 12" 3000 Watt Subwoofer Dual 4 Ohm Competition SUMMOXL124

Massive Audio 12" 3000 Watt Subwoofer Dual 4 Ohm Competition SUMMOXL124

Product ID: 680289848

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Details

Brand
Massive Audio
Speaker maximum output power
3000 Watts
Frequency response
250 Hz
Connectivity technology
wired
Audio output mode
Surround
Mounting type
Flush Mount

🔊3000W Peak Power

🧲250oz Triple Stacked Magnet

🎛️Dual 4 Ohm 3" Voice Coil

Description

🔊 Own the Bass, Command the Crowd!

MAGNET MASTERY - 250oz triple stacked strontium magnets deliver ultra-focused magnetic force for deep, precise bass.
PRECISION ENGINEERING - Lightweight cast aluminum basket and anodized pole-plate maximize strength and sound clarity.
PRO GRADE CONNECTIVITY - Heavy-duty direct input wires and triple tinsel leads guarantee flawless signal transfer every time.
UNMATCHED POWER OUTPUT - Feel the earth-shaking 3000 watts peak power that dominates any competition.
KEVLAR REINFORCED DURABILITY - Kevlar spunlace voice coil and fiber-reinforced cone ensure rugged reliability under extreme conditions.

The Massive Audio SUMMOXL124 is a 12" subwoofer engineered for competition-level performance, boasting a peak power of 3000 watts and RMS of 1500 watts. Featuring a triple stacked 250oz strontium magnet and dual 4 Ohm 3" voice coils with Kevlar reinforcement, it delivers powerful, precise bass with industrial-grade durability. Its rugged cast aluminum basket and advanced motor design ensure maximum efficiency and longevity, making it the ultimate choice for serious audiophiles and pro installers.

Specifications

Power Source	Corded Electric
Number of Power Levels	1
Speaker Maximum Output Power	3000 Watts
Subwoofer Connectivity Technology	Wired
Connectivity Technology	Wired
Audio Driver Size	12 Inches
Audio Driver Type	Dynamic Driver
Unit Count	1.0 Count
Number of Audio Channels	3.0
Frequency Response	250 Hz
Compatible with Vehicle Type	Car
Compatible Devices	Smartphone, MP3 Player
Speaker Size	12 Inches
Woofer Diameter	12 Inches
Specific Uses For Product	Car Mount
Controller Type	Voice Control
Color	Black
Is Waterproof	FALSE
Audio Output Mode	Surround
Mounting Type	Car Mount
Material Type	Aluminum
Speaker Type	Subwoofer
Additional Features	Bass Boost
Recommended Uses For Product	For Car Audio Systems
Subwoofer Diameter	12 Inches