diff --git a/headphones/admin.py b/headphones/admin.py
index 8ada4fb..07721ef 100644
--- a/headphones/admin.py
+++ b/headphones/admin.py
@@ -176,6 +176,23 @@ class CaseColorsInline(admin.TabularInline):
         return formset
 
 
+class FrequencyResponseInline(admin.StackedInline):
+    model = FrequencyResponse
+    extra = 1
+    fields = ('file', 'author', 'source_link', 'is_primary', 'notes', 'file_preview')
+    readonly_fields = ('file_preview',)
+
+    def file_preview(self, obj):
+        if obj.file:
+            return format_html(
+                '<a href="{}" target="_blank">{}</a>',
+                obj.file.url,
+                os.path.basename(obj.file.name)
+            )
+        return "-"
+    file_preview.short_description = "Файл"
+
+
 @admin.register(Headphones)
 class HeadphonesAdmin(admin.ModelAdmin):
     form = HeadphonesAdminForm
@@ -209,7 +226,7 @@ class HeadphonesAdmin(admin.ModelAdmin):
             'fields': [
                 ('impedance', 'sensitivity'),
                 'frequency_range',
-                ('frequency_response_chart', 'frequency_response_chart_author', 'frequency_response_chart_link'),
+                # ('frequency_response_chart', 'frequency_response_chart_author', 'frequency_response_chart_link'),
                 ('microphone', 'noise_cancellation'),
                 'ip_rating',
             ]
@@ -228,7 +245,7 @@ class HeadphonesAdmin(admin.ModelAdmin):
         }),
     ]
 
-    inlines = [HeadphonesDriverInline, HeadphonesImagesInline, CaseColorsInline]
+    inlines = [HeadphonesDriverInline, HeadphonesImagesInline, CaseColorsInline, FrequencyResponseInline]
 
     # Методы для отображения
     def get_reviews_count(self, obj):
@@ -421,7 +438,6 @@ class AudioCodecAdmin(admin.ModelAdmin):
 # ======================
 # Регистрация разъемов и подключений
 # ======================
-
 @admin.register(CableConnectionType)
 class CableConnectionTypeAdmin(admin.ModelAdmin):
     list_display = ('name', 'is_detachable')
@@ -464,6 +480,7 @@ class ChargingInterfaceAdmin(admin.ModelAdmin):
 # Регистрация отзывов и медиа
 # ======================
 
+
 @admin.register(HeadphonesReviewType)
 class HeadphonesReviewTypeAdmin(admin.ModelAdmin):
     list_display = ('name', 'slug')
diff --git a/headphones/models.py b/headphones/models.py
index eae290f..7ecd6bc 100644
--- a/headphones/models.py
+++ b/headphones/models.py
@@ -24,7 +24,10 @@ def upload_to_case_image(instance, filename):
     return f"headphones/{instance.headphones.id}/case_images/{instance.slug}.{ext}"
 
 def upload_to_frequency_response(instance, filename):
-    return f"headphones/{instance.headphones.id}/frequency_response/{filename}"
+    """Путь для сохранения: headphones/<headphones_id>/frequency_response/<filename>"""
+    ext = filename.split('.')[-1]
+    unique_filename = f"{uuid.uuid4().hex}.{ext}"
+    return f"headphones/{instance.headphones.id}/frequency_response/{unique_filename}"
 
 # ======================
 # Базовые справочники
@@ -639,6 +642,67 @@ class HeadphonesCaseIP(models.Model):
         return self.code
 
 
+class FrequencyResponse(models.Model):
+    headphones = models.ForeignKey(
+        'Headphones',
+        on_delete=models.CASCADE,
+        related_name='frequency_responses',
+        verbose_name="Наушники"
+    )
+    file = models.FileField(
+        upload_to=upload_to_frequency_response,
+        verbose_name="Файл АЧХ"
+    )
+    author = models.CharField(
+        max_length=100,
+        verbose_name="Автор измерения",
+        blank=True,
+        null=True
+    )
+    source_link = models.URLField(
+        verbose_name="Ссылка на источник",
+        blank=True,
+        null=True
+    )
+    notes = models.TextField(
+        verbose_name="Примечания",
+        blank=True,
+        null=True
+    )
+    is_primary = models.BooleanField(
+        default=False,
+        verbose_name="Основная АЧХ"
+    )
+
+    class Meta:
+        verbose_name = "АЧХ наушников"
+        verbose_name_plural = "АЧХ наушников"
+        ordering = ['-is_primary', 'headphones__model']
+
+    def __str__(self):
+        return f"АЧХ {self.headphones.model} ({self.author or 'без автора'})"
+
+    def save(self, *args, **kwargs):
+        if self.is_primary:
+            # Снимаем флаг is_primary у других АЧХ этих наушников
+            FrequencyResponse.objects.filter(
+                headphones=self.headphones
+            ).exclude(
+                pk=self.pk
+            ).update(is_primary=False)
+        super().save(*args, **kwargs)
+
+    def delete(self, *args, **kwargs):
+        """Удаление файла при удалении записи"""
+        if self.file:
+            try:
+                if default_storage.exists(self.file.name):
+                    default_storage.delete(self.file.name)
+            except Exception as e:
+                print(f"Ошибка при удалении файла АЧХ: {e}")
+        super().delete(*args, **kwargs)
+
+
 # ======================
 # Основная модель наушников
 # ======================
@@ -711,13 +775,13 @@ class Headphones(models.Model):
     )
 
     # Технические характеристики
-    frequency_response_chart = models.FileField(
-        verbose_name="АЧХ (CSV)",
-        upload_to = upload_to_frequency_response,
-        null=True,
-        blank=True,
-        help_text="Данные в формате [{'frequency': 20, 'amplitude': -2.5}, ...]"
-    )
+    # frequency_response_chart = models.FileField(
+    #     verbose_name="АЧХ (CSV)",
+    #     upload_to = upload_to_frequency_response,
+    #     null=True,
+    #     blank=True,
+    #     help_text="Данные в формате [{'frequency': 20, 'amplitude': -2.5}, ...]"
+    # )
 
     frequency_response_chart_author = models.CharField(
         verbose_name="Автор АЧХ",